I for one certainly don't. Maybe some of what he says will happen but so what. Things change that's the only thing that's certain. If what you buy is good enough for your purpose then it's fine. I'd have thought that m4/3s as a lens system is good enough and broad enough to stand up on it's own for some time even if new developments stop.

Actually, I can sort of see his point in a way. It's a reasonable argument he's proposing, but it's far from clear whether he's right. Sure, the Oly 300 f4 on the E-M1ii won't deliver the same pixel-level quality of the Canon 600mm f4 on a 5D mk IV, but it's so much lighter that many photographers will choose to use it. At the smaller focal lengths the weight difference is less, but then there are other benefits such as class-leading IBIS, fancy features like live time etc, which when coupled with the fact that if you're shooting at base ISO on m43 then the IQ is superb for nearly all intended uses.

Time will tell as to whether m43 will survive. I personally think it's 50/50.

However there was a reference in the link to mobile phones now being equivalent to compact cameras and I believe that is pretty much true. I have been using some state of the art Huawei mobile phones (P20 Pro and Mate 20 Pro) and these can produce impressive images; in many ways as good as or better than, say, an XZ-1.

But Micro Four Thirds is way better and has the advantage of significant portability compared to even APS DSLRs and mirrorless cameras, let alone full frame.

Panasonic entered the full frame business because it could via its collaboration with Leica and borrowing their L-mount. I don't believe Panasonic would have invested in their own FF mount and system. FF is a niche and they won't sell nearly as many FF cameras and lenses as Micro Four Thirds, though it's fair to say they expect to make a good deal more money per unit sold with FF. By adding FF it also gives them some valuable kudos.

Panasonic also argues that APS is too close to FF in terms of capability and luggability. If you want a high-end APS-C camera you might as well get an entry-level FF camera. This means APS will feel the FF squeeze and it will be interestingto see what happens with APS in mirrorless. Sony has been concentrating on its FF range with not a lot happening with their APS range. Nikon still has no APS mirrorless offering. Canon has improved the APS EOS-M range but it's not really a pro-competitor like the top Olympus and Panasonic offerings.

It's an interesting time, but declaring the demise of Micro Four Thirds just seems like a way of driving internet traffic to me.